I have in the past couple months added some new amps to my collection and am looking for some good suggestions for preamp tubes. 1979 JMP 2204 and a Rockitt Retro 50 watt super lead. Up to this point I have relied on mostly Chinese 12ax7's and some EH, Sovtek, and JJ 12ax7's and that is what I have loaded in both these amps and they do sound quite good but I am looking to spend a little more money for some older anos stuff as it seems the marshall aficionados prefer other some better older tubes to bring out the best. Not looking for powertubes for now as I still have several old pairs and quads of good winged C's which seem great in both these amps as well as the JJ EL34L's they came loaded with. So what are some good options?